The reason why allergic purpura is easy to recur is because of repeated contact with allergens, must find allergens no longer contact, can go to dermatology or allergic reaction department to find allergens, once find allergens, then avoid contact. If it is induced by drugs, infection, etc., you should be careful with drugs, prevention and treatment of infection. It is very difficult to change the allergic body itself, but the key is to know your “weakness” and pay attention to it at all times. If the allergic purpura attack urine occult blood positive or even urine protein, to pay attention to, timely consultation nephrology, monitoring urinary routine and kidney damage indicators, most of the “purpura kidney” prognosis is good, very few will progress to chronic kidney disease. You can try some immune regulating Chinese and Western medicine like Jin Shui Bao capsule, nuclear cheese oral liquid, etc.